well, lets see....

the motor, motor box, and ESC weigh in at 4lb 5oz.
two of the 6 cell lipo's weigh in at 4lb 3oz
all 4 lipo's weigh 8lbs 7oz.

all that together weighs 12lbs 1oz !!!
wow lol, well I should be able to use that weight to balance it anyways, and I'm sure it will handle it fine.

that's about 25lbs, 7oz total. It will probably end up just over 26 lbs...Not all that bad for a bird this size actually.

Casey